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allantois

noun

the vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals)

Quick reference

Word Facts

Word length
9
Starts with
A
Ends with
S
Contains
LL
Scrabble score
9
Database source
OEWN 2025 Core

Meaning

Definitions

noun

  1. the vascular fetal membrane that lies below the chorion and develops from the hindgut in many embryonic higher vertebrates (reptiles, birds and mammals)

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